$ ctf42

#constraint-solving CTF challenges

12 CTF challenges using constraint-solving from 11 CTFs (2020–2026), 12 with writeups. Mostly Reverse (83%).

Reverse · 10 Pwn · 1 Crypto · 1

Often combined with

#z3 4 #reversing 3 #lisp 1 #z3-solver 1 #matrix 1 #java-reversing 1 #base64 1

Challenges

Filter and sort these in the challenge browser →

Challenge CTF Weight Category Has
Classic_Checkers BlueHens 2023 24.61 Reverse files wu 3
Random_Maze UofTCTF 2024 23.90 Reverse files wu 2
EXCELlent hxp 2020 94.00 Reverse files wu 2
Recovery vsCTF 2022 23.32 Crypto files wu 2
Magical_Mystery_Club COMPFEST 2021 – Reverse files wu 1
CEOs_Lost_Password UofTCTF 2024 23.90 Reverse files wu 1
WednesdayThursdayFriday VishwaCTF 2023 22.69 Reverse files wu 1
Hercules DCTF 2021 – Reverse files wu 1
Untitled_Encore SekaiCTF 2026 79.25 Reverse files wu 1
Build_A_Flag_Workshop SunshineCTF 2024 38.57 Reverse files wu 1
drum_machine LakeCTF 2025 Quals – Reverse files wu 1
HeckerBeluga Engineer 2022 22.65 Pwn files wu 1